PAGE 14 — UM HANDHELD VIBRATOR • OPERATION MANUAL — REV. #0 (06/29/20)
MAINTENANCE
INSPECTION
1. Visually inspect the motor daily before use for defective
or missing parts, and have repairs made before use.
2. Regularly check for loose bolts. If loose bolts are found,
tighten securely.
3. Remove the mortar that has adhered at the air vent
(cap). If the air vent is clogged, overheating occurs,
which might result in burnout.
FLEXIBLE SHAFT AND BEARING GREASE CHECK
1. After each operation of about 100 hours, cleanly wipe
off the grease on the flexible shaft and bearing, then
apply new grease evenly on the entire surface of the
shaft.
2. Pull out the rotor from the vibrating case, then wash
the inside of the case and the bearing of the rotor,
thoroughly.
3. When a new bearing is used, fill it sufficiently with
grease. Do not put grease inside the case.
4. Use heat-resistant grease that will not deteriorate by
change in temperature. For vibrator repair, please
contact your distributor.
NOTICE
Always turn off the switch and unplug from the power
outlet before starting check or maintenance work.
NOTICE
This product complies with the applicable safety
requirements. Do not try to make alterations.
CAUTION
If repair is done by someone without proper knowledge
and skill, it might result in the machine performance
being compromised, and may cause a risk of accident
or injury.
CARBON BRUSH CHECK
1. If you notice a drop in motor revolution or decrease of
the force, remove the back cover of the motor to check
the wear of carbon brush.
2. The carbon brush should be replaced with a new one
when its remaining length is less than 5 mm (length of
new brush is 12 mm). See Figure 4.
Figure 4. Checking Carbon Brush
3. Contact your distributor if you need to replace a carbon
brush.
REPLACEMENT
LINE (5 MM)
CARBON
BRUSH
NEW
BRUSH
(12 MM)